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feat(highcharts): implement sparkline-basic (#1072)
## Implementation: `sparkline-basic` - highcharts Implements the **highcharts** version of `sparkline-basic`. **File:** `plots/sparkline-basic/implementations/highcharts.py` **Parent Issue:** #1011 --- :robot: *[impl-generate workflow](https://github.com/MarkusNeusinger/pyplots/actions/runs/20275207199)* --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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‎plots/sparkline-basic/implementations/highcharts.py‎

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"""
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sparkline-basic: Basic Sparkline
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Library: highcharts
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"""
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import tempfile
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import time
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import urllib.request
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from pathlib import Path
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import numpy as np
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from highcharts_core.chart import Chart
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from highcharts_core.options import HighchartsOptions
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from highcharts_core.options.series.area import LineSeries
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from selenium import webdriver
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from selenium.webdriver.chrome.options import Options
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# Data - simulate daily sales trend over 60 days with realistic patterns
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np.random.seed(42)
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base = 100
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trend = np.linspace(0, 20, 60) # Gradual upward trend
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seasonal = 10 * np.sin(np.linspace(0, 4 * np.pi, 60)) # Cyclical pattern
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noise = np.random.randn(60) * 5 # Random variation
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values = base + trend + seasonal + noise
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# Create chart - sparklines are minimal with no chrome
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chart = Chart(container="container")
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chart.options = HighchartsOptions()
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# Chart settings - standard pyplots size with sparkline aesthetic
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# Sparklines are naturally compact, shown in center of larger canvas
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chart.options.chart = {
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"type": "line",
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"width": 4800,
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"height": 2700,
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"backgroundColor": "#ffffff",
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"margin": [100, 100, 100, 100], # Balanced margins for compact look
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"spacing": [0, 0, 0, 0],
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}
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# Title with pyplots format - large for 4800x2700 canvas
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chart.options.title = {
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"text": "sparkline-basic · highcharts · pyplots.ai",
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"align": "center",
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"style": {"fontSize": "72px", "fontWeight": "bold"},
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"y": 80,
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}
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# Hide axes - sparklines have no axes
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chart.options.x_axis = {"visible": False, "lineWidth": 0, "tickWidth": 0, "labels": {"enabled": False}}
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chart.options.y_axis = {"visible": False, "gridLineWidth": 0, "labels": {"enabled": False}}
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# Hide legend
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chart.options.legend = {"enabled": False}
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# Series data - the sparkline itself
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series = LineSeries()
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series.data = values.tolist()
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series.name = "Trend"
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series.color = "#306998" # Python Blue
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series.line_width = 8 # Visible but clean line at 4800x2700
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# Marker settings - highlight min/max and endpoints
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series.marker = {
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"enabled": False, # Hide most markers
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"radius": 0,
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}
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chart.add_series(series)
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# Add min point marker - larger for 4800x2700
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min_idx = int(np.argmin(values))
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min_series = LineSeries()
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min_series.data = [{"x": min_idx, "y": float(values[min_idx])}]
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min_series.name = "Min"
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min_series.color = "#E74C3C" # Bright red for minimum
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min_series.marker = {"enabled": True, "radius": 24, "symbol": "circle"}
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min_series.line_width = 0
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min_series.states = {"hover": {"lineWidthPlus": 0}}
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chart.add_series(min_series)
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# Add max point marker - larger for 4800x2700
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max_idx = int(np.argmax(values))
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max_series = LineSeries()
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max_series.data = [{"x": max_idx, "y": float(values[max_idx])}]
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max_series.name = "Max"
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max_series.color = "#27AE60" # Bright green for maximum
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max_series.marker = {"enabled": True, "radius": 24, "symbol": "circle"}
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max_series.line_width = 0
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max_series.states = {"hover": {"lineWidthPlus": 0}}
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chart.add_series(max_series)
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# Add first point marker (reference) - larger for 4800x2700
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first_series = LineSeries()
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first_series.data = [{"x": 0, "y": float(values[0])}]
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first_series.name = "Start"
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first_series.color = "#6B7280" # Gray for start
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first_series.marker = {"enabled": True, "radius": 20, "symbol": "circle"}
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first_series.line_width = 0
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first_series.states = {"hover": {"lineWidthPlus": 0}}
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chart.add_series(first_series)
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# Add last point marker (reference) - larger for 4800x2700
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last_series = LineSeries()
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last_series.data = [{"x": len(values) - 1, "y": float(values[-1])}]
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last_series.name = "End"
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last_series.color = "#FFD43B" # Python Yellow for end
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last_series.marker = {"enabled": True, "radius": 20, "symbol": "circle"}
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last_series.line_width = 0
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last_series.states = {"hover": {"lineWidthPlus": 0}}
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chart.add_series(last_series)
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# Plot options for clean rendering
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chart.options.plot_options = {
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"series": {"animation": False, "enableMouseTracking": False},
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"line": {"marker": {"enabled": False}},
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}
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# Download Highcharts JS for headless rendering
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highcharts_url = "https://code.highcharts.com/highcharts.js"
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with urllib.request.urlopen(highcharts_url, timeout=30) as response:
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highcharts_js = response.read().decode("utf-8")
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# Generate HTML with inline scripts
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html_str = chart.to_js_literal()
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html_content = f"""<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script>{highcharts_js}</script>
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</head>
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<body style="margin:0; background-color: #ffffff;">
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<div id="container" style="width: 4800px; height: 2700px;"></div>
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<script>{html_str}</script>
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</body>
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</html>"""
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# Save interactive HTML version
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with open("plot.html", "w", encoding="utf-8") as f:
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# For HTML file, use CDN links for better compatibility
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html_interactive = (
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"""<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script src="https://code.highcharts.com/highcharts.js"></script>
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</head>
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<body style="margin:0; background-color: #ffffff;">
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<div id="container" style="width: 100%; height: 100vh;"></div>
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<script>"""
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+ html_str
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+ """</script>
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</body>
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</html>"""
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)
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f.write(html_interactive)
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# Write temp HTML and take screenshot
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with tempfile.NamedTemporaryFile(mode="w", suffix=".html", delete=False, encoding="utf-8") as f:
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f.write(html_content)
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temp_path = f.name
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chrome_options = Options()
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chrome_options.add_argument("--headless")
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chrome_options.add_argument("--no-sandbox")
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chrome_options.add_argument("--disable-dev-shm-usage")
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chrome_options.add_argument("--disable-gpu")
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chrome_options.add_argument("--window-size=4800,2700")
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driver = webdriver.Chrome(options=chrome_options)
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driver.get(f"file://{temp_path}")
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time.sleep(5) # Wait for chart to render
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driver.save_screenshot("plot.png")
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driver.quit()
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Path(temp_path).unlink() # Clean up temp file

‎plots/sparkline-basic/metadata/highcharts.yaml‎

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# Per-library metadata for highcharts implementation of sparkline-basic
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# Auto-generated by impl-generate.yml
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library: highcharts
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specification_id: sparkline-basic
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# Preview URLs (filled by workflow)
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preview_url: https://storage.googleapis.com/pyplots-images/plots/sparkline-basic/highcharts/plot.png
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preview_thumb: https://storage.googleapis.com/pyplots-images/plots/sparkline-basic/highcharts/plot_thumb.png
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preview_html: https://storage.googleapis.com/pyplots-images/plots/sparkline-basic/highcharts/plot.html
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current:
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version: 0
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generated_at: 2025-12-16T16:35:22Z
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generated_by: claude-opus-4-5-20251101
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workflow_run: 20275207199
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issue: 1011
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quality_score: 91
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# Version info (filled by workflow)
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python_version: "3.13.11"
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library_version: "unknown"
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history: []

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